rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10499 ticks this GP) idle=03d4/1/0x4000000000000000 softirq=33087/33092 fqs=4929
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1004313         24            0
rcu: 	cputime:    36143      16345           46   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=19601 q=14326 ncpus=2)
CPU: 0 UID: 0 PID: 8546 Comm: syz.0.487 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:kcov_remote_start+0x2d/0x7a0
Code: fa 55 41 57 41 56 41 55 41 54 53 48 83 ec 10 65 4c 8b 35 ee de 0c 11 48 b8 00 00 00 00 ff ff ff 00 48 85 c7 74 18 90 0f 0b 90 <48> 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 89
RSP: 0018:ffffc90000007b18 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000246 RCX: 0000000000000101
RDX: 0000000000000003 RSI: ffffffff8dad379b RDI: ffffffff8be73f00
RBP: ffffc90000007db0 R08: ffffffff8fced577 R09: 1ffffffff1f9daae
R10: dffffc0000000000 R11: fffffbfff1f9daaf R12: 0000000000000000
R13: ffffffff81c2a188 R14: ffff888168519d40 R15: 0000000000000000
FS:  00007f77486226c0(0000) GS:ffff88818e328000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8a9aff5ff8 CR3: 0000000120a3c000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 ieee80211_rx_list+0x76b/0x3050
 ieee80211_rx_napi+0x1b1/0x3e0
 ieee80211_handle_queued_frames+0xe8/0x1e0
 tasklet_action_common+0x2da/0x4b0
 handle_softirqs+0x22a/0x7c0
 __irq_exit_rcu+0x5f/0x150
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:preempt_schedule_irq+0x48/0xa0
Code: 49 be 00 00 00 00 00 fc ff df eb 09 48 f7 03 10 00 00 00 74 53 bf 01 00 00 00 e8 83 f2 17 f6 e8 9e 7a 50 f6 fb bf 01 00 00 00 <e8> e3 a9 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 24 7c 50 f6 bf 01
RSP: 0018:ffffc90004e1fa40 EFLAGS: 00000206
RAX: 00000000000207e1 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000007 RSI: ffffffff8dad379b RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff8fced577 R09: 1ffffffff1f9daae
R10: dffffc0000000000 R11: fffffbfff1f9daaf R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
 irqentry_exit+0x597/0x620
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:tomoyo_realpath_from_path+0x59d/0x5d0
Code: a9 fe ff ff e8 f4 f5 73 fd 31 ff e8 2d f5 cf fd eb 27 4c 89 ef e8 13 f5 ff ff 48 89 c3 48 89 ef e8 18 f5 cf fd 48 85 db 74 0a <e8> ce f5 73 fd 48 89 d8 eb 13 e8 c4 f5 73 fd 48 c7 c7 fa a7 d2 8d
RSP: 0018:ffffc90004e1fb60 EFLAGS: 00000282
RAX: c69d56b75b5af200 RBX: ffff88816fce5c80 RCX: 0000000000000046
RDX: 0000000000000007 RSI: ffffffff8dad379b RDI: ffffffff8be73f00
RBP: ffff888119242000 R08: ffffffff8fced577 R09: 1ffffffff1f9daae
R10: dffffc0000000000 R11: fffffbfff1f9daaf R12: dffffc0000000000
R13: ffff888119242fe7 R14: ffff888119242000 R15: 0000000000000fff
 tomoyo_path_number_perm+0x246/0x630
 security_file_ioctl+0xc3/0x2a0
 __se_sys_ioctl+0x47/0x170
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f774779acb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7748622028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f7747a15fa0 RCX: 00007f774779acb9
RDX: 0000000000000003 RSI: 0000000040042408 RDI: 0000000000000004
RBP: 00007f7747808bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7747a16038 R14: 00007f7747a15fa0 R15: 00007fff7a94b9b8
 </TASK>
sched: DL replenish lagged too much
